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import abc
from typing import Any, Dict, Optional
from requests import Response, Session
class Transport(abc.ABC):
__slots__ = ()
@abc.abstractmethod
def get(self, url: str, params: Dict, headers: Dict) -> bytes:
"""Send a GET request."""
@abc.abstractmethod
def post(self, url: str, data: Any, headers: Dict) -> bytes:
"""Send a POST request."""
class DefaultTransport(Transport):
"""
Default transport based on the requests library.
:param timeout: Read timeout
"""
__slots__ = "timeout", "session"
def __init__(self, timeout: float = 2.0, session: Optional[Session] = None):
self.timeout = timeout
self.session = session or Session()
def get(self, url: str, params: Dict, headers: Dict) -> bytes:
"""
:raises HTTPError: if status code is not valid for content unmarshalling.
"""
res = self.session.get(
url, params=params, headers=headers, timeout=self.timeout
)
return self.handle_response(res)
def post(self, url: str, data: Any, headers: Dict) -> Any:
"""
:raises HTTPError: if status code is not valid for content unmarshalling.
"""
res = self.session.post(url, data=data, headers=headers, timeout=self.timeout)
return self.handle_response(res)
@classmethod
def handle_response(cls, response: Response) -> bytes:
"""
Status codes 200 or 500 means that we can unmarshall the response.
:raises HTTPError: If the response status code is not 200 or 500
"""
if response.status_code not in (200, 500):
response.raise_for_status()
return response.content
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